Hi?
i already configure sendmail using webmin, when i run it, i only can send an email to local user that's mean user in my box only, when i try to retrieve an email from another computer using outlook express, it's failed. can anyone tell me what the posibble cause?

check /var/log/maillog as you try to send an email and let us know what it says

To retrieve mail from your linux system has nothing to do with sendmail

If you have mail on your system and you want to access it from another machine you should run pop3s or imaps. then configure outlook express to connect to the pop or imap server on the secure port and you can get your mail.


To have people send mail to you or a user on your machine by sending it to your machine you need to have the sendmail smtp server listening on port 25

check this with telnet


telnet yourmachinenameoripaddress 25

you should get a server response


To send mail to someone on the internet using your linux box as a mail server you must configure sendmail as an smtp relay server.

thanx 4 ur help.
actually i forgot to tell u my current situation,
now, i'm in the middle of build up mail server for my company, my company using win2k server with domain mydomain.com.my (unregistered) so right now i dont want to interupt the current system so i configure my linux box as prosysrv.test.com. so i want to test retrieve an email for account myname@proxysrv.test.com from machine using win2k in domain mydomain.com.my, so i configure outlook express using pop3 and smtp,
but icannot retrieve my email, can u tell me how to run pop3s.
as ur suggestion to try telnet but i got this message as below

telnet: connect to address 192.168.128.4: Connection refused

hi!
from my outlook express, when i try to retrieve email from mail server the error as below occured:

The connection to the server has failed. Account 'Testing', Server: '192.168.128.4', Protocol: POP3, Port : 110 , Secure (SSL) : No, Socket error : 10054, Error number : 0x800CCC0E

if it's installed you just start it up like this

chkconfig pop3s on

now setup the mail client to connect to the server on the secure port, port 995, not 110 and make sure it's not firewalled. (see firewall rules below)



telnet port 25 fails

this means the sendmail server is not listening to port 25 (you need to reconfigure sendmail), or it is blocked by a firewall (allow connections to port 25)


allow connections for secure pop3 and smtp


IPTABLES=/sbin/iptables

$IPTABLES -N tcp_packets

$IPTABLES -A INPUT -p TCP -i eth0 -j tcp_packets
$IPTABLES -A INPUT -m limit --limit 3/minute --limit-burst 3 -j LOG --log-level DEBUG --log-prefix "IPT INPUT packet died: "

$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 995 -j ACCEPT
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 25 -j ACCEPT
$IPTABLES -A tcp_packets -p TCP -j DROP

test to see if the services are listening


netstat -lnp | grep :995
tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN 31372/xinetd

netstat -lnp | grep :25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 32312/master


If they are listening and you can't connect then it's likely due to the firewall or wrong ip address.

test the connection with ping.

thanx a lot

now i already solved the problem, i'm very appreciated ur help, hope u willing to give me a hands next time i got the problem
thanx

How did you fix it, other people may have the same problem.

i forgot several configuration,

1) i forgot tu enable ipop3 service
2) i forgot about my firewall configuration

so i just reconfigure all those thing, my sendmail working properly

so thanx 4 ur help

cool

just now i configured my sendmail server @mailserver.com become relay for another mail server @mydomain.com, when i try to send an email from client using outlook ,an error occured said,
the msg could not be sent becoz one of the recipients was rejected by the server. the rejected address was <me@mailserver.com>.........serverresponse 550 55.1........

Check the file /var/log/maillog on the server

after i read the log file, i saw the problem is user unknown, so if i want to send an email to another user registered in another mail server also another domain differ with my mail server using my linux box account, how

in the file /etc/aliases add an entry like this..

fred: fred@hisdomain.com

then run this..

sendmail -bi



mail received that has the address fred@yourdomain.com will be sent to fred@hisdomain.com